Bracelet assembly corresponding to multi-attribute physical connections

ABSTRACT

The invention discloses a bracelet assembly corresponding to multi-attribute physical connections, which has a groove link, which has a link base and a groove base. There are a first through hole and a second through hole penetrating in a lateral direction and respectively arranged at the two ends of the link base in a lateral direction, and the first through hole and the second through hole are aligned in the lateral direction to form a first axis. And the link base is provided with a first cylindrical portion and a second cylindrical portion, the first cylindrical portion is provided with a first shaft hole penetrating in a lateral direction, and the second cylindrical portion is provided with a second shaft hole penetrating in a lateral direction.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Patent Application No. PCT/CN2019/099020 with an international filing date of Aug. 2, 2019, designating the United States, now pending, and further claims priority benefits to HONG KONG Patent Applications No. 18111138.0, filed on Aug. 29, 2018. The contents of all of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference.

TECHNICAL FIELD

The invention relates to a bracelet assembly, in particular to a bracelet assembly corresponding to multi-attribute physical connections.

BACKGROUND

To meet the needs of daily life, new wrist-wear equipment was developed, such as wrist-wear spray devices, wrist-wear mobile terminals with large high-efficiency antennas and so on. However, in the prior art the bracelet assemblies cannot transmit liquids and gases, nor can they simultaneously transmit a variety of substances with different physical properties, such as liquids, gases, electric waves, currents and so on.

In view of the foregoing defects of the prior art, it is really necessary to design a bracelet assembly corresponding to multi-attribute physical connections.

SUMMARY

The technical problem to be solved by the present invention is to provide a bracelet assembly corresponding to multi-attribute physical connections, which has high reliability and durability, and can simultaneously transmit a variety of substances with different physical properties.

To solve the above technical problems, the technical solution of the present invention is:

A bracelet assembly corresponding to multi-attribute physical connections includes a groove link, which comprises: a link base, in which both ends of the link base in the lateral direction are provided with a first through hole and a second through hole penetrating in the lateral direction which are aligned in the lateral direction to form a first axis; and the link base is provided with a first cylindrical portion and a second cylindrical portion protruding forward from the link base, and the first cylindrical portion is provided with a first shaft hole penetrating in the lateral direction, the second cylindrical portion is provided with a second shaft hole penetrating in the lateral direction, and the first shaft hole and the second shaft hole are aligned in the lateral direction to form a second axis which is aligned with the first axis in the front-rear direction; and a groove base, which is integrally formed with the link base or is mounted on the link base at an intermediate position between the first axis and the second axis of the link base; and the bottom of the groove base is provided with an accommodating groove recessed upwardly and penetrating through the groove base in the front-rear direction; wherein a plurality of the groove links are connected with each other to form a groove bracelet, and the accommodating groove of the groove link or the groove bracelet is configured to be passed through by a soft tube or a cable to make that the bracelet assembly is capable of transmitting liquid, gas, electric wave and current.

Compared with the prior art, the present invention has at least the following beneficial effects: the groove link is provided with an accommodating groove that penetrates the groove base in the front-rear direction, which is used for a soft tube or a cable passing. The soft tube or cable passes through the accommodating grooves to connect the various units, so that multiple wrist-wears can be combined to make it possible to develop more new wrist-wear equipments with high reliability and durability, easy to be assembled and disassembled, and also easy to be tidied and repaired. In addition, by providing a plurality of soft tubes or cables in the accommodating groove, substances with multiple physical properties can be transmitted at the same time, wherein the soft tube can transmit liquid and gas, the circular cable can transmit currents or electric waves.

The invention also includes the following further improvements:

Further, the rear end of the groove base is provided with a first vertical face in a laterally elongated inverted “concave” shape, which is vertically connected to the first axis and is directly above the middle of the first axis; two lower ends of the first vertical face are respectively connected with a first bevel face aligned with the first axis and then inclined forward; the front end of the groove base is provided with a second vertical face in a laterally elongated inverted “concave” shape, which is vertically connected to the second axis and is directly above the middle of the second axis; two lower ends of the second vertical face are respectively connected with a second bevel face aligned with the second axis and then inclined backward; and the accommodating groove is located at the intermediate position between the first axis and the second axis. In this embodiment, when the groove bracelet is curled, the influence of the soft tube or cable by the curling is reduced to the minimized.

Further, the level of the link base is higher than the groove base, and the groove base is located at the central of the link base and leans forward so that a portion of the groove base is located between the first cylindrical portion and the second cylindrical portion which are lower than the level of the groove base. In this embodiment, when the groove bracelet is curled, the link base and the groove base can cover and protect the soft tube or cable.

Further, the first cylindrical portion and the second cylindrical portion are structurally symmetrical to the middle of the second axis to make sure that the arrangement of the first cylindrical portion and the second cylindrical portion is right, and the first cylindrical portion and the second cylindrical portion are each provided with a recessed edge on the lower side.

Further, the bottom of the link base is provided with two circular arc grooves capable of accommodate the first cylindrical portion and the second cylindrical portion of another groove link; the lower side of the two circular arc grooves are each provided with a convex edge on the lower side, which fits with the recessed edge of another groove link to limit the degree of extreme curling of the groove bracelet; and a first step is provided between the two circular arc grooves, and fits the top of the groove base of another groove link. In this embodiment, it can ensure that a plurality of the groove links can be connected together.

Further, the first shaft hole and the second shaft hole are respectively installed with a unidirectional spring shaft, and two opposite ends of the two unidirectional spring shafts are configured to be respectively inserted into the first through hole and the second through hole of another groove link, to ensure that a plurality of the groove links can be connected together to form a groove bracelet. The unidirectional spring shaft is designed to minimize the length of the spring shaft to ensure that the width of the accommodating groove in the lateral direction is sufficient.

Further, the link base further comprises a protruding wing, which is protruding upward and backward from the middle of the link base and is wider than the accommodating groove in the lateral direction; and the front end of the protruding wing is recessed rearward to form an accommodating portion capable of accommodating a protruding backward portion of the protruding wing of another groove link. In this embodiment, the protruding wing can strengthen the strength of the middle of the groove link and cover the gap occurring between two adjacent groove links when the groove bracelet is curled.

Further, the bracelet assembly further comprises an opening and closing base, which comprises a main body provided with an accommodating chamber configured to accommodate a soft tube or cable of a spare length, and with two notches which is located at the two ends of the accommodating chamber and configured to be docked with the accommodating groove of the groove base; wherein the accommodating chamber, the notch and the accommodating groove are successively connected to form a complete channel so that one end of the soft tube or cable is accommodated and connected at the accommodating chamber, and the other end passes through the notch and then penetrates into the accommodating groove. In this embodiment, it can ensure that the length of the soft tube or cable and the groove bracelet can be adjusted in this bracelet assembly at the same time.

Further, the opening and closing base further comprises a connection cover and a frame; one end of the connection cover is pivotally connected to one end of the main body, and the other end is pivotally connected to one end of the frame; the other end of the frame is pivotally connected to the bracelet assembly; and the connection cover can be configured to close over the accommodating chamber, and the frame can be configured to frame the periphery of the connection cover and the main body. In this embodiment, it is convenient to arrange the interior of the accommodating chamber.

Further, one or both ends of the main body provided with the notch can be provided with the link base or the first cylindrical portion and the second cylindrical portion to connect to the groove link directly. In this embodiment, it is easier to assemble the wristband.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a wristband composed of groove links and an opening and closing base.

FIG. 2 is an oblique rear perspective view of the bottom of the groove link.

FIG. 3 is an oblique front perspective view of the top of the groove link.

FIG. 4 is a perspective view of the groove link and the unidirectional spring shafts not assembled together.

FIG. 5 is a front cross-sectional view of the groove link and the unidirectional spring shafts assembled together.

FIG. 6 is an exploded view of the groove link of the second embodiment.

FIG. 7 is a schematic view of the first axis and the second axis of the groove link.

FIGS. 8 to 11 illustrate four variants of the groove link.

FIG. 12 is a cross-sectional view of the groove bracelet when it is straightened.

FIG. 13 is a schematic view of the soft tube or cable in the accommodating groove.

FIG. 14 is a cross-sectional view of the groove bracelet under extreme curling.

FIG. 15 is a perspective view of the first embodiment of the opening and closing base

FIG. 16 is a perspective view of the opening and closing base.

FIG. 17 is a perspective view of the second embodiment of the opening and closing base.

FIG. 18 is a perspective view of the opening and closing base from another perspective

FIGS. 19 and 20 illustrate two states when the opening and closing base is opened.

FIG. 21 is a perspective view of the groove bracelet composed of a plurality of groove links.

FIG. 22 is a perspective view of a wrist-wear spray device combined with one opening and closing base and one common base.

FIG. 23 illustrates the basic operation concept of the wrist-wear spray device.

FIG. 24 illustrates a combination of three opening and closing bases and one common base.

FIG. 25 is a perspective view of a wrist-wear wireless network sharing device.

FIG. 26 illustrates the basic operation concept of a wrist-wear wireless network sharing device.

FIG. 27 is a perspective view with the box link open.

FIG. 28 is a perspective view of the box link mounted on a bracelet.

FIG. 29 illustrates an embodiment of a bracelet assembly corresponding to three attributes physically connection.

FIG. 30 illustrates an embodiment of a bracelet assembly corresponding to multi-attribute physical connections mounted with a flat cable.

DETAILED DESCRIPTION OF EMBODIMENTS

The invention is further described below with reference to the drawings and embodiments.

As shown in FIG. 1, a bracelet assembly corresponding to multi-attribute physical connections includes a plurality of groove links and a base, which can be arranged with a soft tube and a round multi-core cable and a coaxial waveguide cable simultaneously.

As shown in FIG. 2 to FIG. 5, it is a first embodiment of the groove link A. The groove link A includes a link base 11 and a groove base 14. The link base 11 is provided at both ends in the lateral direction with a first through hole 111 and a second through hole 112 penetrating in the lateral direction. The first through hole 111 and the second through hole 112 are aligned in the lateral direction to form a first axis. 113. The link base 11 is provided with a first cylindrical portion 12 and a second cylindrical portion 13 protruding forward from the link base 11. The first cylindrical portion 12 is provided with a first shaft hole 121 penetrating in the lateral direction, the second cylindrical portion 13 is provided with a second shaft hole 131 penetrating in the lateral direction, and the first shaft hole 121 and the second shaft hole 131 are aligned in the lateral direction to form a second axis 123. which is aligned with the first axis 113 in the front-rear direction.

The groove base 14 is integrally formed with the link base 11 at the central position between the first axis 113 and the second axis 123 of the link base 11. The bottom of the groove base 14 is provided with an accommodating groove 141 recessed upwardly and penetrating through the groove base 14 in the front-rear direction. A plurality of groove links A are connected together to form a groove bracelet. The accommodating groove 141 of the groove link A or the groove bracelet is configured to pass through the soft tube or cable 31 so that the bracelet assembly can transmit liquids, gases, electric waves and currents.

The rear end of the groove base 14 is provided with a first vertical face 142 in a laterally elongated inverted “concave” shape, which is vertically connected to the first axis 113 and is directly above the middle of the first axis 113. The front end of the groove base 14 is provided with a second vertical face 143 in a laterally elongated inverted “concave” shape, which is vertically connected to the second axis 123 and is directly above the middle of the second axis 123. Two lower ends of the first vertical face 142 are connected to a first bevel face 144 aligned with the first axis 113 and then inclined forward, and two lower ends of the second vertical face 143 are connected to a second bevel face 145 aligned with the second axis 123 and then inclined backward. The accommodating groove 141 is located at an intermediate position between the first axis 113 and the second axis 123. In this embodiment, when the groove bracelet is curled, the influence of the sofe tube or cable 31 by the curling is minimized.

The level of the link base 11 is higher than the groove base 14, and the groove base 14 is located at the central of the link base 11 and leans forward so that a portion of the groove base 14 is located between the first cylindrical portion 12 and the second cylindrical portion 13. The level of the groove base 14 is higher than the first cylindrical portion 12 and the second cylindrical portion 13. In this embodiment, it ensures that the link base 11 and the groove base 14 can cover and protect the soft tube or cable 31 when the groove bracelet is curled. The first cylindrical portion 12 and the second cylindrical portion 13 are structurally symmetrical to the middle of the second axis 123 to ensure that the arrangement of the first cylindrical portion 12 and the second cylindrical portion 13 is right, and the first cylindrical portion 12 and the second cylindrical portion 13 are each provided with a recessed edge 118 on the lower side.

Two circular arc grooves 114 are provided on the bottom of the link base 11 to be able to connect the first cylindrical portion and the second cylindrical portion of another groove link, and a first step 115 is provided between the two circular arc grooves 114. The first step 115 fits with the top of the groove base of another groove link. The two arc grooves 114 are each provided with a convex edge 119 on the lower side, which fits with the recessed edge 118 of another groove link to limit the degree of extreme curling of the groove bracelet.

The first shaft hole 121 and the second shaft hole 131 are respectively installed with a unidirectional spring shaft 15, and two opposite ends of the two unidirectional spring shaft 15 are configured to be respectively inserted into the first through hole 111 and the second through hole 112 of another groove link, to ensure that a plurality of groove links can be connected together to form a groove bracelet. The unidirectional spring shaft 15 is designed to minimize the length of the spring shaft to ensure that the width of the accommodating groove 141 in the lateral direction is sufficient.

The link base 11 further comprises a protruding wing 16 protruding upward and backward from the middle of the link base 11. The width of the protruding wing 16 in the lateral direction is greater than the width of the accommodating groove 141 in the lateral direction. The front end of the protruding wing 16 is recessed rearward to form an accommodating portion 17 capable of accommodating a protruding rearward portion of the protruding wing of another groove link, and the protruding wing 16 can strengthen the strength of the middle of the groove link A and cover the gap occurring between two adjacent groove links when the groove bracelet is curled.

As shown in FIGS. 6 and 7, it illustrates the second embodiment of the groove link A. The only difference from the first embodiment is that the groove base 14 of the second embodiment is assembled on the centre of the link base 11 between the first axis 113 and the second axis 123 in an assemblable manner. But the groove base 14 of the first embodiment is integrally formed with the link base 11 at the same position.

FIGS. 8 to 11 illustrate four variants of the groove link: the first groove link A2-1, the second groove link A2-2, the third groove link A3, and the fourth groove link A4. As shown in FIGS. 1, 12 and 14, the front portion of the first groove link A2-1 can be connected with the first groove link A, the second groove link A2-2, the fourth groove link A4, the opening and closing base B and the common base C. The rear portion of the first groove link A2-1 can be connected to the second groove link A2-2 for finely adjusting the length of the groove link.

The front portion of the second groove link A2-2 can be connected to the first groove link A2-1, and the rear portion of the second groove link A2-2 can be connected to the groove link A, the first groove link A2-1 and third groove link A3.

Both the front and the rear portions of the third groove link A3 can be connected with the rear portion of the groove link A and the second groove link A2-2, the fourth groove link A4, the opening and closing base B and the common base C.

Both the front and rear portions of the fourth groove link A4 can be connected with the front portion of the groove link A and the first groove link A2-1 and the third groove link A3. The third groove link A3 and the fourth groove link A4 are configured to switch the connection direction of the groove link A.

As shown in FIGS. 12 and 13, they illustrate the state of the groove bracelet when the groove bracelet is straightened, and the central axis of the soft tube or cable 31 and the central axis of the spring shaft. FIG. 14 illustrates the state of the groove bracelet under extreme curling. The limit of the curling angle between each groove link is 45 degrees to ensure that when the groove bracelet is extremely curled the influence of the soft tube and cable 31 by the curling is minimized.

As shown in FIGS. 15 to 20, the bracelet assembly corresponding to multi-attribute physical connections further comprises an opening and closing base B. The opening and closing base B comprises a main body B5. The main body B5 is provided with a accommodating chamber B8 and two notches B3 at both ends of the accommodating chamber B8. The accommodating chamber B8 is configured to accommodate a soft tube or cable 31 of a spare length, and the notch B3 is configured to be docked with the accommodating groove 141 of the groove base 14. The accommodating chamber B8, the notch B3 and the accommodating groove 141 are successively connected to form a complete channel so that one end of the soft tube or cable 31 is accommodated and connected at the accommodating chamber B8, and the other end passes through the notch B3 and then penetrates into the accommodating groove 141. In this embodiment, it can ensure that the length of the soft tube or cable 31 and the groove bracelet can be adjusted in this bracelet assembly at the same time.

Further, the opening and closing base B further comprises a connection cover B7 and a frame B6. One end of the connection cover B7 is pivotally connected to one end of the main body B5, and the other end is pivotally connected to one end of the frame B6; the other end of the frame B6 is pivotally connected to the bracelet assembly. And the connection cover B7 can be configured to close over the accommodating chamber B8, and the frame B6 can be configured to frame the periphery of the connection cover B7 and the main body B5. In this embodiment, it is convenient to arrange the interior of the accommodating chamber B8. One or both ends of the main body B5 provided with the notch B3 can be provided with the link base or the first cylindrical portion and the second cylindrical portion to connect to the groove link A directly. In this embodiment, it is easier to assemble the wristband.

FIG. 15 is a perspective view of a first opening and closing base B, which comprises an electrical connector B1 and a connection port cover B2, where the connector B1 is a pogo pin connector. FIG. 16 is a perspective view of the opening and closing base, which comprises a notch B3 arranged at one end of the body B5. FIG. 17 is a perspective view of a second opening and closing base B, which comprises a cylindrical connector B4 and a connection port cover B2. The cylindrical connector B4 is configured to connect to a soft tube or a coaxial cable 31. FIG. 18 is a perspective view of the opening and closing base from another perspective, which comprises a notch B3 at one end of the main body B5, a frame B6, and a connection cover B7 in the middle of the frame B6. The connection cover B7 can rotate and the frame B6 can rotate around one end of the connection cover B7 as an axis.

As shown in FIGS. 19 and 20, the main body B5 is provided with a accommodating chamber B8 and a soft tube restriction block B9 located in the accommodating chamber B8. There is no certain shape restriction in the accommodating chamber B8. The end of the soft tube or cable 31 is accommodated in the accommodating chamber B8, and the soft tube or cable 31 can be taken into the accommodating chamber B8, and the soft tube restriction block B9 restricts the extension of the soft tube or cable 31. When more than one soft tube or cable 31 is provided, the soft tube restriction block B9 is set to be an interface. The main body B5 is further provided with a locking screw B0 mounted on the side thereof, and the screw B0 is used to fasten the unit of the wrist-wear device. The locking screw B0, the electrical connector B1, and the connection port cover B2 are only exemplary embodiments.

FIG. 21 illustrates a groove bracelet composed of a plurality of groove links A.

FIG. 22 is a wrist-wear spray device composed of an opening and closing base and a common base, which includes a liquid tank 41, an automatic sprayer 42 and a soft tube 31, and the liquid in the liquid tank 41 is transmitted through the soft tube 31 to the automatic sprayer 42. FIG. 23 is a wrist-wear spray device worn on a hand. The device includes a display 43, a pressing switch 44, and a sensor 45, which is configured to sense spraying. The dotted line in FIG. 23 is the spraying path.

FIG. 24 illustrates a combination of three opening and closing bases and a common base.

FIG. 25 illustrates a wrist-wear wireless network sharing device with a large high-efficiency antenna, which is composed of three opening and closing bases and a common base. It can be assembled on a common base C with an LTE MIMO terminal 51 and connected to the antenna 52 on the opening and closing base B by a coaxial cable guiding wave, and connected to the battery 53 on another opening and closing base B by a circular multi-core cable.

FIG. 26 is a diagram illustrating a basic operation concept of a wrist-wear wireless network sharing device equipped with a large high-efficiency antenna.

FIGS. 27 and 28 are perspective views of the box link A5, which is configured to replace the accommodating chamber B8 of the opening and closing base B when the assembly lacks the opening and closing base B.

FIG. 29 illustrates an embodiment of a bracelet assembly corresponding to three attributes physically connection, which includes three soft tubes or cables 31 and a box link A5. The width of the accommodating groove 141 of the groove link A in the transverse direction directly affects the number of soft tubes that can be accommodated. FIG. 29 illustrates how to set the groove bracelet composed of groove links A with the wider accommodating groove 141, which can implement the physical connections of three attributes at the same time.

FIG. 30 illustrates an embodiment in which a flat cable 71 is mounted on the bracelet assembly corresponding to multi-attribute physical connections. The flat cable 71 is docked with the groove bracelet composed of groove links A with the wider accommodating groove 141. The groove bracelet is arranged with a connecting cable 72 to connect to the end of the flat cable.

Compared with the prior art, the present invention provides a bracelet assembly corresponding to multi-attribute physical connections, which can combine multiple types of wristbands to make it possible to develop new types of wrist-wear equipments.

As shown in FIG. 29, the bracelet assembly can simultaneously transmit multiple substance with different physical properties. As shown in FIGS. 22 and 23, the bracelet assembly can transmit liquid or gas. As shown in FIGS. 24 to 26 and FIG. 30, the bracelet assembly can transmit currents or electric waves. As shown in FIGS. 1, 21, 22, 24 and 29, the bracelet assemblys can be combined to form various types of bracelets.

The structure of the assembly is simple but integrates a number of important concepts and new elements, comprising: designing a new wrist-wear equipment based on the bracelet assembly, with random structure and appearance, high reliability and durability, easy to assemble and disassemble, easy to tidy and maintain, easy to produce and low cost, and strong follow-up of the design. The production of groove links can make full use of 3D printing technology to achieve the best results, and can be matched with the current wrist-wear equipment to design new wrist-wear equipments, and can enhance the functions and capabilities of wrist-wear equipments currently on the market.

Based on the above points, the structure of the groove link and the opening and closing base must be as simple as possible to obtain the best balance and effect. The design of the groove link and the opening and closing base is corresponding to a multi-unit wrist-wear equipment that uses soft tubes or cables to connect each unit, so it can transmit one or more of currents, electric waves, liquids and gases, etc. between these units. In addition, the common base can be customized to fit a specific unit. With the common base or other matching assemblys or units, more changes can be created.

The grooved bracelet is an open structure, so the soft tube or cable in the accommodating groove is in a natural state. There are notches on both sides of the opening and closing base for the soft tube or cable to pass through, so the accommodating chamber of the opening and closing base is not limited to adjusting the length of the soft tube or cable, and it also has the function of mounting other components. Soft tubes or cables can be selectively configured, so multiple different devices can be mounted on the bracelet assembly at the same time.

The present invention is not limited to the specific embodiments described above, and various changes made by those skilled in the art based on the above concepts without creative labor fall within the protection scope of the present invention. 

I claim:
 1. A bracelet assembly corresponding to multi-attribute physical connections, comprising a groove link, which comprises: a link base, in which both ends of the link base in the lateral direction are provided with a first through hole and a second through hole penetrating in the lateral direction which are aligned in the lateral direction to form a first axis; and the link base is provided with a first cylindrical portion and a second cylindrical portion protruding forward from the link base, and the first cylindrical portion is provided with a first shaft hole penetrating in the lateral direction, the second cylindrical portion is provided with a second shaft hole penetrating in the lateral direction, and the first shaft hole and the second shaft hole are aligned in the lateral direction to form a second axis which is aligned with the first axis in the front-rear direction; a groove base, which is integrally formed with the link base or is mounted on the link base at an intermediate position between the first axis and the second axis of the link base; and the bottom of the groove base is provided with an accommodating groove recessed upwardly and penetrating through the groove base in the front-rear direction; wherein a plurality of the groove links are connected with each other to form a groove bracelet, and the accommodating groove of the groove link or the groove bracelet is configured to be passed through by a soft tube or a cable to make that the bracelet assembly is capable of transmitting liquid, gas, electric wave and current.
 2. The bracelet assembly according to claim 1, wherein the rear end of the groove base is provided with a first vertical face in a laterally elongated inverted “concave” shape, which is vertically connected to the first axis and is directly above the middle of the first axis; two lower ends of the first vertical face are respectively connected with a first bevel face aligned with the first axis and then inclined forward; the front end of the groove base is provided with a second vertical face in a laterally elongated inverted “concave” shape, which is vertically connected to the second axis and is directly above the middle of the second axis; two lower ends of the second vertical face are respectively connected with a second bevel face aligned with the second axis and then inclined backward; and the accommodating groove is located at the intermediate position between the first axis and the second axis.
 3. The bracelet assembly according to claim 1, wherein the level of the link base is higher than the groove base, and the groove base is located at the central of the link base and leans forward so that a portion of the groove base is located between the first cylindrical portion and the second cylindrical portion which are lower than the level of the groove base.
 4. The bracelet assembly according to claim 1, wherein the first cylindrical portion and the second cylindrical portion are structurally symmetrical to the middle of the second axis, and the first cylindrical portion and the second cylindrical portion are each provided with a recessed edge on the lower side.
 5. The bracelet assembly according to claim 1, wherein the bottom of the link base is provided with two circular arc grooves to accommodate the first cylindrical portion and the second cylindrical portion of another groove link; the two circular arc grooves are each provided with a convex edge on the lower side, which fits with the recessed edge of another groove link to limit the degree of extreme curling of the groove bracelet; and a first step is provided between the two circular arc grooves, and fits the top of the groove base of another groove link.
 6. The bracelet assembly according to claim 1, wherein a unidirectional spring shaft is respectively installed in the first shaft hole and the second shaft hole.
 7. The bracelet assembly according to claim 1, wherein the link base further comprises a protruding wing, which is protruding upward and backward from the middle of the link base and is wider than the accommodating groove in the lateral direction; and the front end of the protruding wing is recessed rearward to form an accommodating portion capable of accommodating a protruding backward portion of the protruding wing of the other groove link.
 8. The bracelet assembly according to claim 1, wherein the bracelet assembly further comprises an opening and closing base, which comprises a main body provided with an accommodating chamber configured to accommodate a soft tube or cable of a spare length, and with two notches which is located at the two ends of the accommodating chamber and configured to be docked with the accommodating groove of the groove base; wherein the accommodating chamber, the notch and the accommodating groove are successively connected to form a complete channel so that one end of the soft tube or cable is accommodated and connected at the accommodating chamber, and the other end passes through the notch and then penetrates into the accommodating groove.
 9. The bracelet assembly according to claim 8, wherein the opening and closing base further comprises a connection cover and a frame; one end of the connection cover is pivotally connected to one end of the main body, and the other end is pivotally connected to one end of the frame; the other end of the frame is pivotally connected to the bracelet assembly; and the connection cover can be configured to close over the accommodating chamber, and the frame can be configured to frame the periphery of the connection cover and the main body.
 10. The bracelet assembly according to claim 8, wherein one or both ends of the main body provided with the notch can be provided with the link base or the first cylindrical portion and the second cylindrical portion to connect to the groove link directly. 